NOW Foods L-Tryptophan, 1000mg Double Strength

Tryptophan is an essential amino acid therefore, it is not synthesized by the body and must be obtained from the diet. Tryptophan is critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function. Every lot of NOW L-Tryptophan is tested to be free of peak E and microbial contamination.

Natural color variation may occur in this product.